英文關鍵字
activity
area
brigade
build
builders
bulldozer
civil
clay
construction
day
digger
ditch
dozer
dust
engineering
excavator
gravel
grit
helmet
job
ladle
laying
load
loading
masonry
material
men
multifamily
operator
outdoors
pebble
people
pit
sand
shovel
slab
summer
team
tractor
worker
workers
working
workplace